Multiple-cylinder engine.



F. X, BAGHLZ if. 'i REPS! MULTIPLE CYLINDER HIGHER: APPLICATION FILED JUIEE18,1907.

8 SHEETS-SHEET 1.

1m 880,958. 'PATENTED MAR. a, 1908. RX, BAOHLB & J. 0. LPKEEBS'. MULTIPLE CYLINDER ENGINE.

APPLICATION FILED JUNE13, 1907.

3 SHBBTSSHEET 2.

:NVENTORS 7 6. 6m; m-mw 073 44. I W E. j 70M of Sandusky and State of Ohio, have intion.

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No. 880,958. Specification of Letters Patent. Patented March 3,1908.

' Application filed June 13, 1907. Serial No. 378,691.

described in the following specification and illustrated in the accompanying drawings, in which i Figure 1 is a vertical section of the engine embodying our invention taken on the dotted line 1- 1 in Fig. 5. Fig. 1* is a partial section along the same line showing the position of the valve when the crank is at 60 past. upper center on the down strokcl Figs. 2, 3 and 4 are diagrammatical vertical sections taken, respectively, on the dotted lines 2 2, 3 3 and 4 4 in Fig. 5, Fig. 5 is a side elevation of. the engine with the rotary valve and its casing in longitudinal section on the dotted, line 5 5 in Fig. 7 Fig. 6 is an inner side View of the rotary valve when in the position shown in Fig. 5, and Fig. 7 is a left hand end elevation of the engine.

Referring to the drawings, 1, Z, 3 and 4 designate in order from left to right the several cylinders of a two-cycle founcylinder '75 engine, each of which is provided with the usual receiving and distributingport 5 leading to the pum ing-chainber 6 of'its cylinder, the inlet or c arging port 7 leadin to the combustion end of its cylinder, an the ex haust-port 8. The pistons 9 are provided a at their lower ends with the enlargements 9, which operate in the lower enlarged ends of the cylinders and are connected by their piston-rods 10 to a crank-shaft 11, the cranks of which are arranged in the usual manner, namely with the cranks of cylinders 1 and 2 on opposite sides of the shaft and at right angles to the cranks of cylinders 2 and 3, which latter are opposite to each other. '90

Secured to one side of' and connecting the several cylinders of the engine, as shown, is the housing or valvecasing 12, which is form ed with a lon itudinal cylindrical chamher for receiving the rotary-valve 13, and for of a three'or more cylinder engine the charge each cylinder is provided with the ports 14 is pumped into the combustion. end of each and 15, which register, respectively, with the cylinder by the pistons of two or more cylinports 5 and 7 of the cylinder.

To all whom it may concern:

Be it known that we, FRANK X. BAOHLE and dorm C. L. Knnns, citizens of the United States, and residents of Clyde, in the county vented a certain new and useful Multiple- Cylinder Engine; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, andto the figures'of reference marked thereon, which form a part of this specifica- O'ur invention relates to explosive engines, and. particularly to rotary valvesfor use in conjunction with engines employing three or more cylinders, and for the purpose of illustration the same isherein shown and described as being used in connection with a two-cycle four cylinder engine, but is not restricted to such use.

'1 he employment of two-cycle engines for heavy work so far as we are aware has hereto'fore been impracticable on account of the low efficiency thereof due to the comparatively small charge that is admitted to the combustion end of the cylinder during the brief period that the inlet port is uncovered by the piston at the limit of its outgoing stroke.

The object of our invention is to overcome the above objections and to increase the practicability and efficiency of two-cycle engines of the two or more cylinder type by the provision, in combination therewith 0 simple means whereby, in the case of a two cylinder engine, the charge is pumped into the combustion end of each cylinder by the piston of the other cylinder, and in the case dcrs of the series thus in the latter case The valve 13 is formed throughout its charging a cylinder with at least twice as length with a central cylindrical chamber or much gas as is possible. where each cylinder passageway 16, and the surrounding chamis only supplied with the charge created alone ber 17, the former of which will hereinafter by its own pistomthus making the strength he referred to as the supply-chamber andof the outg 'ng stroke of each piston apthe latter as the "'distr1buting-chan1ber.

prosizmitcly as elficientas the power stroke Both ends of the distributin -chamber and of a four-cycle engine. one end of the supply-cham snare closed, The operation, construction and arrangewhile the other 'endof the supply-chamber ment of the narts of the invention are fully icornmunicates with. the carburetor. Projecting from the closed end of the valve 13 through a box 18 secured to the casing-12 is a stub-shaft 19, which carries a gear-wheel 20. This gear meshes with an idler 21, which is driven by a gear-wheel 22 on an end of the crank-shaft 11, said gears andidler being of equal size so that a' single revolution is impa'rtedto the valve at each revolutionof the crank-shaft.

- A group of ports 23, 24 and 25 is provided in the valve 13 for each cylinder, the ports 23 and2f1 of each group being arranged in circular series to successively register with the associated port 14 in the casing 12 while theport 25 is-oflset from the orts 23 and 24 in position to register with t 1e, associated port 15 in the casing The ports 23, which may quarter turn of the crankshaft. apparent that inasmuch as the several cranks registers with its charging port 715 during theper od that the same is uncovered by its I piston, which is approximately during a It is thus the crank-shaft are. differentially positioned, the like ports of the'several groups will also be differentially positioned or arranged in staggered relation around the valve.

The 0 eration' of our invention is, as follows he supply-chamber 16 of the valve being in communication with the carburetor, the charges will be drawn from said chamber and into the pumping-chambers 6 of the cylinders through the valve ports 23 and associated cylinder ports 514 on the downstrokes of the pistons, and on the rip-strokes of the pistons these charges will be forced through the cylinder ports 5-14 and valveports 24, which latter have moved in register with the ports 5-44 for such purpose, into the distributing-chamber 17 of the valve from which they are distributed to the proper cylinders above the istons through the valve ports 25 and cylin er ports 715.

. Witha four cylinder engine two ofthe pis tons are drawing in charges and distributing them to a different but common cylinder, as for instance, No. 1 cylinder has its charge compressed therein by Nos. 2 and 4 pistons; No. 2 cylinder by Nos. 1 and 3 pistons; No.

3 cylinder by Nos. 1 and 4 pistons; and No.

4 cylinder by Nos. 2 and 3 pistons, thus causing' the combustion end of each cylinder to be charged with approximately twice as ,rnuch gas as would be the case were only one piston operating to charge it, as has heretofore been the case. Referring to l igs. 1,

1 2, 3 and 4, it willbe noted that when the crank-shaft is in the position shown, No. 2

piston will have near y reaclied its limit, of

downward movement at which )oint the receiving port 23 is just about t'o-close while the'port 23 of No. 4 cylinder is just 0 ening to t 1e receiving port 514 of its cy inder.

During the movement of No. 2 crank ap proximately between the points a b in its revolution the charging. port 7 cylinder will beuncovered by the piston and the sociated valve port 25 will be in register tierewith so that a charge that is being forced int'oxthe distributing-chamber 17 of the valve by Nos. 1 and3 pistons will be 15 of No'. 2-

caused to flow into No. 2 cylinder, which is the only one open to the distributing-chant her during such period. As soon as the port 25 for N o. 2 cyllm'lcr-has passed its cylinder port 7-15 ,,the valve port 25 to No. 4 cyliir der comes in register with its port. 7 -.15, which is just being uncovered by its )iston and a charge forcedinto' said cylind er by Nos. 2 and 3 pistons, and the cylinders Nos. and 3 are each then charged in the same manner in the order given, so that at each.

uarter of a revolution of the valve one .of

t e ports 25 is open to its cylinder and a charge is being-compressed therein by the action inders.

It is apparent that by the use of our invention the speed of the engine maybe reguof the pistons of two of the other cyl lated-through themedium of the valve, as

the speed maybe increased by regulating the valve to cause the ports to bpen earlyto admit a full chargeof gas, or the speed may ios be decreased by regulating the valve'to po'rts to open-late to admit only a arge.

cause the part of a It is also apparent that shouldour invens 'tionbe employed in'connection with a three cylinder engine the valve ports will bear ranged so that a different one of each of th like ports of the valve will register with their respective cylinder ports at approximately each third of a revolution of the valve.

Having thus described'our invention, what we claim as new andde'sire to secure by Letters Patent, is,-'

A multiple cylinder engine having "its" cylinders provided with pum ingand combustion-chambers, said c 1am )OlS each havmg a port conunumcatmg therewith, a

crank-shaft and a rotary valve geared to,

revolve with the engine crank-shaft and havm, a gas supply-chamber and a as distri )uting-cham er, said supply-chamber having. ports arranged to register at different points in a rotation of the valve with the ports leading to the un1ping-chambers-of the cylinders, and sai digtributing-chambefiao Cir '' havin two series of orts seems one series of which registers with the pumping-chamber ports at different points in a rotation of the valve while the other series registers with the eombustion-chamber ports at different points in a rotation of the valve.

Z. A multiple cylinder engine having its cylinders each provided with pumping an combustion-chamloers which have ports com rnunicating therewith, a rotary valve having a supply-chamber provided with ports arranged to register at diil' eren't. times with the pumping-chamber ports when the valve is rotated having a distrilmting-chamber provided with oi receiv ng; and a oi" discharging ports, the former of which ports at different points with the pumpin amber ports and the latter -'mihustion-chaniher ports when Jointed, and means for rotating l a predetermined speed.

vie cylinder engine having its -s ded with pumping and comidrliainhers having ports communieating therewith, a rotary valve having a amber and a distributing-chamoer, one "former of which is provided with a seri a of staggered ports for communicating with pumping-chamber port-s when the vs vs rotated and the latter being provine-d with series of staggered. ports for comumnicating with the pumping-chamber ports and a series of staggered ports for communicating with the comhustion'chamber ports when the valve is rotated, and means for rotating the V cylinder engine having its with pumping and comcylinders *irovidcd ousti nsznhers, said chambers each havtherewith, a oiug a port communicating tary valve forming a distributing-chamher and h ng a series or ports conimunicatmg' with a oi supply and intended to ter with the valve rotates and a communicating with the distrihuting'chamher, one series of which registers with the pumping-chamber ports and the other with the conihustionchamber ports when the valve is rotated, a source oi gas supply, and means for rotating the valve.

5. A multiple cylinder engine having its cylinders provided with pumping and. cornbustion-charnbers each having a port coinmunicating tiierewith, a rotary valve having a chamber in cohnnunication with a source of supply and provided with ports which register with the ports of the pumpingchamoers of the cylinders at predetermined points in a revolution of the valve, and a distributing chamher provided with ports which register with the ports of the pumphambers and ports which register with ports of the comhustiomchamhers at the "mm n -chamber orts as i i n valve at a predetermined double series of ports determined points in a revolution of the valve,said valve also having a distributingchamber provided with a series of ports for registering with the ports in chambers at predetermined points in a revolution oi the valve, and a seriesoi ports for registering with the ports in the combustionchambers at predetermined points in a revolution of the valve, and means for rotating the valve at a predetermined speed.

7. A multiple cylinder engine having its cylinders provided with pumping and combustion-chambers, each having a port'leading thereto, a rotary valve forming a supplychamber and a distributing-chamber an having a group of three ports for each cylinder, one port for opening communication between the supply-chamber and the pump 'iiigcliainber port in its cylinder at a redetermined point in a revolution of the vs vs, and the other two opening from the distributing chamber, and one intended to register with the pumping-chamber port and the other with the combustion-chamber port of the associated cylinder at redetermmed oints in a revolution of the va ve, and means tor rotating the valve, substantially as described.

8. A multiple cylinder engine having its cylinders provided with pumping and combustion-chambers, each having a port leading thereto, a piston in each cylinder, a source of gas supply, a rotary valve having a chamber in communication with. the gas supply and from which the cylinders draw their charges through the ports in the pumping-chambers in the pumping-operations of the pistons, and havin a chamber adapts to communicate at di 'erent times with the ports both in the pumping and combustionchambers when the valve is rotated, whereby the compressing operations of the pistons cause a charge to of the pumping-chambers through e valvechainher having the said two series of ports and into a combustion-chamber of one of the other cylinders oi the set, and means for rotating the valve. I

9. A. multiple cylinder engine having its cylinders provided with pumping and combustion-chambers, each of which chambers is provided with a port, a piston in each cylinbe forced from a pluralitythe pumpingwith the ports in the'pumping-chambers and having discharging ports adapted to communicate 1ne1nbe1' also having a chamberprovided der, a source of gas supply, a rotary valve l member having a chamber in eonnnunica tion with the gas supply and provided with ports adapted to communicate at different times with the ports in the pumping-chambers duriiig a revolution of said member, said with ports arranged to open communication through the chamber between the combus- Lion-chamber of one cylinder of the set and. the puinpingichambers of a plurality of other cylinders of the set, whereby the pistons of a plurality of the cylinders 0 erate to compress a charge in one of the cy inders of the set.

10. A multiple cylinder engine having its cylinders provided with pumping and coinlnistion-chambers, each having a port communicating therewith, a piston in each cylinder, a source of supply, a rotary valveassociated with the cylinders and having an inner gas supplychamber communicating with the gas sup ')ly, and a surrounding distributing chamber, the supply e chamber having ports adapted to communicate at different times in a revolution of the valve ports in the pumping-chambers, and the distributing-chamber having receiving ports arranged to communicate at different times in a revolution of the valve with the at different pointsin a revolution of the valve with the ports in the combustion-chambers,

the relative arrangement of said two sets of ports in the distributing-chamber being such that the pistons of a plurality of cylinders will operate to compress a c arge through said distributing-chamber into the combustion-chamber of one of the other cylinders, and means to rotate the valve.

11. A multiple cylinder engine having its cylinders provided with bustion-ehambers, each having a port in communication therewith, the pumping-charm bers having communication With a source of gas supply from which they draw their charges during the pumping operations of their pistons, a source of gas supply, a piston in each cylinder, and a rotary member having a chamber provided with ports arranged to open communication through the chamber between the combustion chamber of one cylinder of the set and the pumping-chambers of a plurality of other cylinders of the set when the member is rotated, whereby the pistons of a plurality of the cylinders operate to compress a charge in the combustion-chamber of one of the other cylinders of the set, substantially as described. I

Initestimony whereof we have hereunto signed our names to this specification in the presence of two subscribing witnesses.

FRANK X. BACHLEt JOHN C. L. KREBS. \Vitnesses:

Jon Evans, FRANK Kunns.

pumping and com" 

